iOS 9.3 brings some new features as well as other enhancements such as:
- Night Shift mode, which automatically shifts the colors in your display to the warmer end of the spectrum when it is sunset in your location
- Education improvements, which introduces a preview of Shared iPad that enables multiple students to use the same iPad at different times throughout the day
- Adds support for playing video encoded with Dolby Digital Plus audio streams
- Notes improvements
- Apple News improvements
- Health improvements
- Apple Music improvements
- Photos improvements
- iBooks improvements
- CarPlay improvements
- Hardware keyboard improvements and fixes
- Other bug fixes, performance and stability improvements